A model is developed which describes the kinetics of redox dissolution of a powder comprising soft-centre particles, i.e. particles with a comparatively inert, outer layer and a more reactive, inner core. The model is then used to interpret the non-simple cubic rate law kinetics exhibited in the oxidative dissolution of partially dehydrated samples of ruthenium dioxide hydrate by bromate ions under acidic conditions.
A. Mills and D. Worsley, J. Chem. Soc., Faraday Trans., 1990, 86, 3405 DOI: 10.1039/FT9908603405
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